関連する実験動画
Updated: Jun 15, 2026

07:23
Describing a Transcription Factor Dependent Regulation of the MicroRNA Transcriptome
Published on: June 15, 2016
Lin28: マクロロールを担うマイクロRNAの調節体
Srinivas R Viswanathan1, George Q Daley
1Children's Hospital Boston and Dana Farber Cancer Institute, Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, and the Howard Hughes Medical Institute, MA 02115, USA.
Cell
|February 25, 2010
まとめ
リン28タンパク質は,レット7マイクロRNAの処理を調節し,細胞の多能性,発達のタイミング,がんの発症に影響を及ぼします. このRNA結合タンパク質は,これらの基本的な生物学的プロセスを理解するための鍵です.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学とは
- 癌生物学 癌生物学について
背景:
- Lin28は保存されたRNA結合タンパク質です.
- Lin28は,let-7マイクロRNAの処理に影響を与える.
- let-7マイクロRNAファミリーは,様々な生物学的プロセスに不可欠です.
研究 の 目的:
- let-7マイクロRNA処理の調節におけるLin28の役割を明らかにする.
- リン28媒介のレット7調節が,多能性,発達,腫瘍形成に及ぼす影響を理解する.
主な方法:
- Lin28とlet-7のマイクロRNA前駆体間の相互作用を調査しました.
- RNA処理を研究するために分子生物学技術を活用した.
- モデルシステムにおける細胞の多能性および発達タイミングに対するLin28調節の効果を調べた.
- リン28の腫瘍性経路における役割を分析した.
主要な成果:
- Lin28は,let-7マイクロRNAの処理を直接調節する.
- この調節は,成熟したlet-7miRNAsの豊富性と活性に影響します.
- Lin28の活動は,多能性の維持と関連しています.
- Lin28とlet-7の調節不良は,発達異常や癌に起因している.
結論:
- リン28は,レット-7マイクロRNA生物発生の重要な調節体である.
- Lin28-let-7軸は,幹細胞生物学,発達のタイミング,腫瘍発生の進行において重要な役割を果たしています.
- Lin28-let-7経路をターゲットにすることで,発達障害やがんの治療戦略を提供することができる.
関連する概念動画
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
lncRNA - Long Non-coding RNAs
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...

